248 Annals of the South African Museum. 



1856 Physa cyrtonota, Bgt., Eev. et Mag. Zool. viii. p. 238. pi. 15, 



f. 1, 2. D.F. 

 Amen, malac.i. p. 177. pi. 21, f. 1,2. D.F. 



1873 ,, tropica, Krs., Sow., Conch. Icon. pi. 5, f.32. D.F. 



1874 Isidora Jick., Fauna N.-O.-Afr. p. 205. N. 

 1880 Physa lirata, Crvn., P.Z.S. p. 617. pi. 57, f. 10. D.F. 



1885 iro^ca,Krs.,Cless. ) Conch.Cab.p.288.pl.41,f.8,ll. D.F. 



1886 cyrtonata, Bgt.,Cless.,i&zd.p.323.pl.39(1884),f.5. D.F. 

 ,, craveni, Ancey ( = lirata, Crvn., 1880, nee Tristram, 



1863), Ancey, Le Naturaliste, viii. p. 358. 

 1889 lirata, Crawf., Morel., J. de C. xxxvii. p. 20. (Err. typ.) 



1897 Isidora tropica, Krs., von Mts., D.-O.-Afr., p. 140. D. 



1898 Physa craveni, Stur., S.A. Moll. p. 76. Emend. Norn. 



1899 Ancey, M. & P., A.M.N.H. iv. p. 193. N. 

 1910 Isidora tropica, Krs., Bttg., Abh. Senckenb. Naturf. Ges. Frank- 

 furt, xxxii. p. 453. N. 



Type of tropica in Stuttgart Museum ; cyrtonota in Geneva 

 Museum; lirata in British Museum. 



Hab. TRANSVAAL. Eiver Lepenula (tropica, Wahlberg). Mooi 

 Eiver (lirata, Craven). 



NATAL. Examples recorded, but require verification. 



CAPE OF GOOD HOPE. Port Elizabeth (lirata, fide Morelet). 

 Stellenbosch (Peringuey). Montagu ; Black Eiver, Maitland (Con- 

 nolly). Olifant Eiver (cyrtonota, Verreaux). 



DAMARALAND. Okaputa Pan (subfossil, Hermann). 



Jickeli remarks that cyrtonota " agrees perfectly with tropica." I 

 have not seen an authentic example of Bourguignat's species, but 

 judging from his description and figure, it certainly does so. The 

 type set of lirata are slightly immature specimens of tropica, of 

 which there is a fine co-type available for comparison in the British 

 Museum. Krauss mentions that the young of tropica have a ribbed 

 epidermis, the feature on which Craven founded his species. 



525. ISIDORA VERREAUXI (Bourguignat). 



1856 Physa verreauxii, Bgt., Eev. et. Mag. Zool. viii. p. 237. pi. 15, 



f. 3, 4. D.F. 



Amen. malac.i. p. 176. pi. 21, f.3,4. D.F. 

 1886 ,, Cless., Conch. Cab. p. 317. pi. 39 (1884), 



f. I. D.F. 



Type ubi ? 



Hab. CAPE OF GOOD HOPE. Olifant Eiver; Knysna (Verreaux). 



